You may not even get paid during your notice period. You will not be protected by Employment Law because you have entered into an employment contract/agreement with the agency, which almost certainly indemnifies the agency from their obligations due to any action taken by the airline.
That would suggest you are an employee, and not quasi self-employed as other competitor airlines would have you believe. If you are then, indeed, an employee would you not have some workers' rights under EU law, albeit from the agency? Is there some opt-out for agencies in the employer/employee relationship and obligations? Is the agency used an EU based one, and are you an EU citizen? Equally, IMHO, contracts can not be written so as to remove legal rights from the signee. That is often attempted under duress & ignorance, but I thought judges had ruled this was invalid. The law has to stand and can not be removed.